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Development of Portable Food Heater Using Design Thinking Approach
Published in Kaushik Kumar, Muralidhar Kurni, Design Thinking, 2023
C. Vigneswaran, M. Senthilkumar, R. Mohanraj, G. Madhan Mohan, A. Archana, M. Brindha, M. Kanmani, B. P. Rajeshwari, Dharshini S. Ruba
Material selection is one of the crucial steps in product development. The proper and scientific method of material selection ensures product durability and customer satisfaction. In this work, the Ashby chart (Ashby and Jones [2012]) has been employed to derive the suitable material for the outer body. The following factors were considered.
Properties and applications of engineering materials
Published in Alan Darbyshire, Charles Gibson, Mechanical Engineering, 2023
Alan Darbyshire, Charles Gibson
There is a tendency for all engineering materials to deteriorate over a period of time. This may be due to corrosion, attack by chemical solvents or degradation due to electromagnetic radiation. The durability of engineering components can be maximised by choosing materials which are best suited to their service conditions. Surface protection and shielding from the above kinds of attack can also prolong service life.
Multi-criteria decision analysis applications and trends in manufacturing domain
Published in Rajeev Agrawal, J. Paulo Davim, Maria L. R. Varela, Monica Sharma, Industry 4.0 and Climate Change, 2023
The identification of appropriate material for any product is among the most critical and difficult jobs in a manufacturing organisation. The right material selection for engineering components presents numerous benefits, such as enhanced durability and performance, cost reduction, longer life cycle, etc., whereas the wrong choice of material results in poor functionality and eventual quality problem (Chatterjee et al., 2018). The selection of material may be thought of as an MCDM challenge, requiring a rational and rigorous material selection approach to determine the best option (Maity et al., 2012). The material selection procedure is complicated owing to the large variety of available substitute materials and their various interactions with various eligibility requirements. MCDM models assist in the realisation of engineering goals by using some form of attribute weighting (Tian et al., 2018). The major purpose of material selection is to maintain prices in check while still attaining product performance targets. In aircraft industries, for example, weight minimisation is among the primary priorities for design upgrades while maintaining a close eye on the component’s cost, performance, and efficiency.
Durability of peat stabilized by RHA based geopolymer formed by adding pure alumina and bauxite powder
Published in European Journal of Environmental and Civil Engineering, 2022
Suhail Ahmad Khanday, Monowar Hussain, Amit Kumar Das
Durability is the endurance or ability of a material to show resistance against adverse exposure or weathering (Amulya et al., 2020). The durability test of wetting-drying cycles was performed as per the procedure followed by Du et al. (2016), except that drying of samples was done at room temperature. The reason is that at elevated temperatures, the process of hydration takes place quickly, which may lead to an overestimation of durability (Kamon et al., 1993). The wetting was done for 24 hours by soaking the samples in distilled water, while drying was done in 48 hours at room temperature. However, the soaking of samples in artificial rainwater may lead to accelerated leaching of cementitious products due to different chemical compositions of rainwater (Du et al., 2014, 2012; Ye & Huang, 2020; Zeng et al., 2018). But the impact of different soaking liquids has not been investigated in this study. The total time taken by 1 complete cycle of wetting-drying is equal to 72 hours. The samples were subjected to 10 cycles or up to their failure, which one comes earlier. After every wetting cycle, the samples were carefully wiped with filter papers. The mass loss (ML) at nth wetting or drying cycles was calculated as per Eq. (1) as:
Integrated LCA-LCC assessment model of offsite, onsite, and conventional construction systems
Published in Journal of Asian Architecture and Building Engineering, 2022
Due to the impacts of building construction and urban development on the environment, it is important to minimize energy consumption and promote efforts to create energy-saving structures. The environmental impacts and energy consumption of buildings differ provisionally based on material types and quantities used. The foremost factors that determine the environmental impact of materials are their method of synthesis and the method of their delivery and handling. Other factors that determine material choice include durability and reuse and recycling potential. The use of more environmentally sustainable and energy-efficient materials has been incorporated into building design. Eco-friendly design of buildings has been gaining popularity for their ability to address energy consumption and environmental impact. Figure 3 depicts an example of an eco-friendly house design (Atkinson-Palombo 2010).
Nanoparticles Applied to Stone Buildings
Published in International Journal of Architectural Heritage, 2021
J. Becerra, A. P. Zaderenko, M. A. Gómez-Morón, P. Ortiz
From the origins of mankind, men have used stone as construction material, from Neolithic buildings to colossal constructions like pyramids or gothic cathedrals. Stone has been chosen, rather than other materials such as wood or clay, due to its high strength and durability. The durability of stone as a construction and decoration material is defined as its capacity to withstand decay while keeping its mechanical and aesthetic properties. Durability is highly influenced by the characteristics of the material (composition, porosity, texture, etc.) and by its environment (temperature, humidity, wind, atmospheric pollution, etc.) (Benavente, Bernabéu, and Cañaveras 2004). Experience has shown that even a material as durable as stone suffers from slow degradation due both to its intrinsic properties as well as extrinsic factors. In this sense, its degradation process has been accelerated in the last decades due to anthropogenic factors. The industrialization process has led to an increase in environmental pollution and, consequently, to a series of alterations such as black crusts, which accelerate the degradation of the stone used in the vernacular and monumental architectures located near the emission points (Grossi and Brimblecombe 2007; Ortiz et al. 2012).